scholarly journals Purification of urbanized melt water with plant sorbents

2021 ◽  
Vol 23 (2) ◽  
pp. 105-117
Author(s):  
A. A. Voronov ◽  
S. V. Maksimova ◽  
E. Yu. Osipova
Keyword(s):  
Water Purification ◽  
Mutual Influence ◽  
Copper Ions ◽  
Local Treatment ◽  
Sorption Process ◽  
Sorption Properties ◽  
Natural Material ◽  
Wood Residue ◽  
Melt Water ◽  
Static Conditions

The article deals with the problem of purification of melt water generated by the urbanized territories. It is proposed to use wood residue from sawing of plantings to obtain relatively inexpensive sorption material for the contamination extraction from surface wastewater. The aim of this work is to study the sorption properties of the material obtained by sawing of plantings. Experimental modeling of sorption of dissolved petroleum products and copper ions from an aqueous solution of milled branches of black poplar is carried out under static conditions. The sorption process is studied in accordance with a three-factor design experiment. Laboratory modeling determines the optimum parameters of water purification and the degree of mutual influence of contaminants on the sorption process. Natural material obtained from the poplar components shows the sorption properties in relation to oil products and copper ions in the water environment. The filters made of milled branches and used in local treatment plants will allow solving the problems of municipal services, namely utilization of wood residue from sawing of plantings and effective melt water purification due to the low-cost filtering materials.

scholarly journals KINETICS AND MECHANISM OF SORPTION OF COPPER (II) IONS BY ION EXCHANGER

2020 ◽  
Vol 6 (444) ◽  
pp. 6-14
Author(s):  
Z. Sh. Nazirov ◽  
◽  
S. M. Turabdzhanov ◽  
B. Sh. Kedelbaev ◽  
T. V. Drabkova ◽  
...  
Keyword(s):  
Cation Exchanger ◽  
Copper Ions ◽  
Effective Diffusion ◽  
Kinetic Equations ◽  
Sorption Process ◽  
Diphenyl Oxide ◽  
Order Kinetic ◽  
Sulfonic Cation Exchanger ◽  
Degree Of Extraction ◽  
Static Conditions

In this article the kinetics of the process of sorption of copper (II) ions from aqueous solutions by polymer sulfonic cation exchanger, an elementary unit containing a heterocycle and a sulfonic group, under static conditions at a temperature of 298 K and a copper concentration of 2 mmol / mg is investigated. The sulfonic cation exchanger was preliminarily obtained by the reaction of polycondensation of diphenyl oxide and furfural with further sulfonation to obtain functional ionogenic groups in order to increase the extraction efficiency. The obtained kinetic curves of the dependence of the degree of extraction of copper ions from solution on time were processed using the Boyd, Adamson, and Myers equation, which describes diffusion in a limited volume of solution. The kinetic parameters of the sorption process (effective diffusion coefficient, etc.) are calculated, and the results obtained are compared with the data for the traditionally used industrial cation exchanger, which is a copolymer of styrene and divinyl benzene. It has been established that the process of sorption of copper (II) ions in the sulfonic cation exchanger phase is of an intra diffusion nature and corresponds to second-order kinetic equations.

scholarly journals Sorption of medical preparations by chitosan

2020 ◽  
Vol 164 ◽  
pp. 06025
Author(s):  
Anna Beliaeva ◽  
Galina Nianikova
Keyword(s):  
Quantitative Determination ◽  
Sorption Capacity ◽  
Maximum Degree ◽  
Sorption Isotherms ◽  
Sorption Process ◽  
Sorption Properties ◽  
Before And After ◽  
Static Conditions ◽  
Degree Of Sorption

The article provides information about sorption properties of crab chitosan in relation to Analgin, Aspirin, Quamatel, Mydocalm, Paracetamol, Tsifran and Phtalazol. Quantitative determination of medicines’ amount before and after sorption was performed by HPLC-MS method with the preliminary plotting of calibration curves. The sorption capacity of chitosan taken in different concentrations was determined. Sorption isotherms and kinetic curves of medications’ sorption by chitosan were plotted. It has been shown that the maximum degree of sorption in static conditions for all studied medicines was achieved within an hour after the beginning of the sorption process.

scholarly journals A research into sorption properties of peat briquettes used to remove ions of cadmium, lead and copper from wastewaters

Vestnik MGSU ◽  
2020 ◽  
pp. 1534-1545
Author(s):  
Barys N. Zhytsianiou ◽  
Anatoli D. Hurynovich ◽  
Darya D. Sianchuk
Keyword(s):  
Chemical Interaction ◽  
Copper Ions ◽  
Equilibrium Concentration ◽  
Sorption Process ◽  
Sorption Properties ◽  
Mathematical Methods ◽  
Treatment Technology ◽  
Peat Deposits ◽  
The Republic ◽  
Cadmium Lead

Introduction. At present, the following areas are the subject of intensive research: methods for removing such toxic metals as cadmium, lead, copper, etc. from wastewaters, namely, using new composite sorbents for this purpose; improvement of ion exchange treatment and, for example, sedimentation of sulphides or oxalates; wood ash sorption; biosorption onto plants. It is a future-oriented trend to use peat as a sorbent in a wastewater treatment technology. Extensive peat deposits in the Republic of Belarus can contribute to production of cheap, environmentally friendly sorbents made of modified peat briquettes. The mission of this work is to study the sorption properties of peat briquettes used to remove cadmium, lead and copper ions from wastewater. Materials and methods. Physicochemical, technological, mathematical methods are employed. Results. The co-authors studied the kinetics of cadmium Cd+2, lead Pb+2, and copper Cu+2 ions sorption onto peat briquettes. They identified that the bigger the grain of peat briquettes, the less efficient the sorption. The sorption process is intensive: it takes cadmium Cd+2, lead Pb+2, and copper Cu+2 ions five minutes to get extracted from the solution; extraction efficiency reaches 91.11; 96.96 and 88.39 %, respectively. 20 minutes is enough to reach degree of equilibrium F = 0.98 for cadmium Cd+2 and lead Pb+2 and F = 0.96 for copper Cu+2. F is equal to 0.99 for all ions in 40 minutes. The multiplicity of extraction, or the ratio of initial concentration to equilibrium concentration reaches 114 for cadmium ions Cd+2, 162 for lead ions Pb+2, and 93 for copper ions Cu+2. In case of saturation, sorption capacity reaches the following values: Сd+2 — 0,0778 mmol/g (8.75 mg/g), Pb+2 — 0.8205 mmol/g (170.00 mg/g), Cu+2 — 2.707 mmol/g (172 mg/g). The co-authors used equations of diffusion and chemical kinetics to establish that the sorption process proceeds in the diffusion mode, and the stage of chemical interaction of metal ions with functional groups of peat contributes to the overall velocity of the process. Conclusions. Peat briquettes represent an effective sorbent used to remove cadmium Cd+2, lead Pb+2, and copper Cu+2 ions from wastewater. The sorption process is almost over in 20 minutes.

scholarly journals Research of pH influence on sorption properties of sorbents on a basis of residual biomass of microalgae Chlorella sorokiniana and duckweed Lemna minor

2019 ◽  
Vol 124 ◽  
pp. 01050
Author(s):  
N.A. Politayeva ◽  
Yu.A. Smyatskaya ◽  
I.V. Dolbnya ◽  
L.S. Kasobov ◽  
D.B. Rakhimov ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Lemna Minor ◽  
Sorption Process ◽  
Chlorella Sorokiniana ◽  
Sorption Properties ◽  
Special Equipment ◽  
Residual Biomass

This scientific research is determined to a study of sorption process of heavy metal ions removal from aqueous solution at water purification with a help of sorption materials on a basis of residual biomass of microalgae and duckweed. It is known that Chlorella sorokiniana and duckweed Lemna minor have in their composition different valuable substances such as lipids, proteins, pigments, pectic substances. After their extraction residual biomass is formed. And in present study it is proposed for using as biosorbent for water purification. At different pH values the removal of ions of heavy metals (Zn(II), Cd(II), Pb(II), Cu(II)) occurs with varied efficiency; it is an important and informative parameter. Equilibrium and initial concentration of the solution with heavy metal ions were measured by voltammetric method of analysis with a use of special equipment. Chitosan was used as a component for making composite sorption materials with residual biomass of microalgae and duckweed. It is biopolymer which widely used in water purification. Due to this, prepared granules have good sorption properties. Nowadays in the era of technology and wide industrial production it is important and actual to develop new ecological technology and useful materials for water treatment and other fields for environment protection in general.

scholarly journals A short review of titania-graphene oxide based composites as a photocatalysts

2021 ◽  
Vol 10 (2) ◽  
pp. 51-60
Author(s):  
Katarina Stepić ◽  
Radomir Ljupković ◽  
Jovana Ickovski ◽  
Aleksandra Zarubica
Keyword(s):  
Graphene Oxide ◽  
Water Purification ◽  
Organic Contaminants ◽  
Environmental Pollutants ◽  
Short Review ◽  
Sorption Process ◽  
Water Disinfection ◽  
Co Catalysts ◽  
Photocatalytic Reactions ◽  
Chemical Wastes

New and effective methods of water purification are necessary to minimize pollution. Many methods have been used in wastewater treatment, but sorption is considered as an easy and economic process. The efficiency of any sorption process mainly depends on the physicochemical properties of the used adsorbent. Since photocatalysts can initiate reactions of decomposition organic contaminants under ultraviolet or sunlight irradiation without using chemicals or producing chemical wastes, photocatalytic reactions are considered a sustainable way to remove a variety of environmental pollutants. Ultraviolet water purification became the most effective method of water disinfection and purification. Heterogeneous semiconductor photocatalysts have recently emerged as an efficient material for purifying water. The crystal structure is crucial for photocatalytic activity and efficiency of semiconductors, thus optimal parameters must be provided during the preparation of photocatalysts. To overcome problems with semiconductors usage, the use of co-catalysts and photocatalyst carriers is one of the solutions. Recently, much emphasis has been placed on using graphene oxide (GO) supported semiconductor photocatalysts. In this paper, a short review of composites of titanium dioxide and graphene oxide-based materials is given.

Hydroxyapatite modified with silica used for sorption of copper(II)

2009 ◽  
Vol 63 (5) ◽  
Author(s):  
Erzsébet-Sára Bogya ◽  
Réka Barabás ◽  
Alexandra Csavdári ◽  
Valentina Dejeu ◽  
Ioan Bâldea
Keyword(s):  
Copper Ions ◽  
Copper Ion ◽  
Reaction Medium ◽  
Kinetic Studies ◽  
Sorption Process ◽  
Silica Content ◽  
Ion Concentration ◽  
X Ray Diffraction ◽  
Structural Modifications ◽  
Preparation Phase

AbstractThis paper aims to increase the sorption capacity of hydroxyapatite and to find the best apatite-based material for metal ions sorption. The sorption process of copper ions from water solutions by HAP and structurally modified HAP was carried out in this work. Structural modifications of HAP were realized in the preparation phase by an addition of sodium silica into the reaction medium. The prepared materials were characterized by physical-chemical methods: IR, electron-microscopy and X-ray diffraction. The composites characterized were tested in kinetic studies regarding ion exchange and adsorption of Cu2+. It was revealed that the silica content, particle size and initial copper ion concentration influence the process rate.

The Adsorption of Copper Ions by Sodium Alginate Immobilized Bacillus Subtilis Body and Purify Copper of Mine Wastewater

2011 ◽  
Vol 356-360 ◽  
pp. 1469-1474
Author(s):  
Jun Jing Guo ◽  
Wen Bin Chen
Keyword(s):  
Bacillus Subtilis ◽  
Aqueous Solutions ◽  
Sodium Alginate ◽  
Metal Ion ◽  
Copper Ions ◽  
Orthogonal Experiment ◽  
Correlation Coefficients ◽  
Sorption Process ◽  
Mine Wastewater ◽  
Bacillus Subtilus

In this study, calcium alginate immobilized bacillus subtilis body was used as an adsorbent for the aim of adsorpting Cu(Ⅱ) ions form the aqueous solutions, On sutiable condition, this study use purely bacteria eliminate other bacteria come in life-form bacteria .Through the orthogonal experiment obtains the optimum condition of sodium alginate fossilization bacillus subtilus pellet to the Cu(Ⅱ) adsorption, The biosorption efficiency was strongly influenced by the pH and the initial concentration ofthe Cu(Ⅱ) aqueous solutions. We also discusses the influence of single factor to the sodium alginate fossilization bacillus subtilus pellet to the Cu(Ⅱ) adsorption ,which included pH, contact time, temperature, initial metal ion concentrations and ionic strength in the adsorption process. The adsorption of the adsorbent on Cu(Ⅱ) is related to its concentration . From the research,we know the maximum adsorption rate to the Cu(Ⅱ) is about 83.2%. Using different model to analyse data. The sorption process follows pseudo-second-order kinetics very well,and the correlation coefficients R all reached to 0.9, and the rate constant of this kinetics model for the adsorption processes, k2, increased with the increasing temperatures. The isothermal data could be well described by the Langmuir adsorption isothermal equations．The experimental results showed that heavy metals could be eficciently accumulated by the immobilized bacteria.

Adsorption of CuCl2 on Mg-Al HTlc: Effect of EDTA and Addition Sequences

2012 ◽  
Vol 573-574 ◽  
pp. 150-154
Author(s):  
Yun Bo Zang ◽  
Nai Ying Wu
Keyword(s):  
Aqueous Solutions ◽  
Sorption Capacity ◽  
Contact Time ◽  
Room Temperature ◽  
Copper Ions ◽  
Sorption Process ◽  
Langmuir Model ◽  
Maximum Sorption Capacity ◽  
Maximum Sorption ◽  
Pseudo Second Order

In this study, removal of copper ions from aqueous solutions by synthetic Mg-Al-HTlc was investigated as a function of contact time, EDTA and addition sequences at room temperature. It is found that HTlc could reduced copper ions concentration effectively. The kinetics closely fit pseudo-second order kinetics with necessary time 9 h to reach equilibrium. The sorption process followed langmuir model. The maximum sorption capacity calculated was found to be 39.4 mg/g. The presence of EDTA and addition sequences could affect sorption of Cu(II) onto HTlc.

scholarly journals Techno-Economic Feasibility for Water Purification from Copper Ions

2021 ◽  
Vol 22 (3) ◽  
pp. 27-34
Author(s):  
Inna Trus ◽  
Vita Halysh ◽  
Mukola Gomelya ◽  
Anna Ivanchenko ◽  
Daniel Benatov
Keyword(s):  
Water Purification ◽  
Copper Ions ◽  
Economic Feasibility

scholarly journals Phase Transitions in Ion-Exchange Materials during the Water Vapor Sorption

2021 ◽  
Vol 248 ◽  
pp. 01003
Author(s):  
Igor Ivanov ◽  
Oksana Ivanova
Keyword(s):  
Phase Transitions ◽  
Water Vapor ◽  
Ion Exchange ◽  
Liquid Film ◽  
Mutual Influence ◽  
Hysteresis Loops ◽  
Sorption Process ◽  
Water Vapor Sorption ◽  
Water Vapor Adsorption ◽  
Vapor Sorption

Water vapor sorption process on ion-exchange materials was investigated using a model taking into account the mutual influence of variations in hydration energy and osmotic effect. At realistic parameter values, phase transitions of the first kind of the thin adsorbed liquid film and thick adsorbed liquid film type can occur. Possible reasons and criteria of the phase transitions that led to stepwise change of ionite resistance were discussed. The phase transitions obtained in this work manifest themselves as hysteresis loops on water vapor adsorption-desorption experimental isotherms. Hysteresis was observed experimentally both at high and at low values of relative air humidity. It was explained using different models: for high and low humidity separately. The present work made it possible to explain these critical phenomena using single mathematical model.

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